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摘要
A novel method to indicate the degree of chirality in polyaniline (PANI) was developed. The ( d-camphorsulfonic acid)- and (HCl)-PANI-based electrodes exhibited significantly different electrochemical performances in d- and l-Alanine (Ala) aqueous solution, respectively, which can be used for the characterization the optical activity of chiral PANI. Cyclic voltammogram, tafel, and open circuit potential of PANI-based electrodes were measured within d- and l-Ala electrolyte solution, respectively. The open circuit potentials under different reacting conditions were analyzed by Doblhofer model formula, in which [C+]poly1/[C+]poly2 was used as a parameter to characterize the degree of chirality in chiral PANI. The results showed that [C+]poly1/[C+]poly2 can be increased with increasing concentrations of (1S)-(+)- and (1R)-(-)-10-camphorsulfonic acid. In addition, we detected that appropriate response time and lower temperature are necessary to improve the degree of chirality. Chirality 25:39-42, 2013.
